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has been cited by the following article:

• TITLE: The Research of Voltage Sag and Power Frequency Overvoltage on 110kV Resistance Grounding System

  AUTHORS: Guo Zeng, Guangliang Feng, Yanping Lv, Shan Sun

  KEYWORDS: Neutral Grounding System by Resistance; One-phase Grounding Fault; Power Frequency Overvoltage

  JOURNAL NAME: Energy and Power Engineering, Vol.5 No.4B, November 11, 2013

  ABSTRACT: This paper researches the voltage transfer characteristics when one-phase ground fault occurred in the resistance grounding system, by using the theory of the asymmetric variable characteristics and the sequence network analysis of the -11 transformer, and concludes the scope of voltage sag and swell and the degree of power frequency overvoltage and their influencing factors in the 110 kV resistance grounding system. Accordingly this paper puts forward the resistance choosing principle: the resistance grounding coefficient must be equal to or greater than 10. So it can not only wipe out the voltage sag and voltage swell but also make sure the overvoltage is limited to electrical equipment allowing range. The method mentioned above is verified by simulation results of a 110 kV power system in ATP.